As Tesla Optimus, Xiaomi CyberOne, and other humanoid robots accelerate toward mass production, industry competition has extended from algorithms and computing power to flexible interaction and bionic experience. If the metal framework is the robot's skeleton and the chip its brain, then silicone rubber is the "bionic skin" that endows robots with flexibility, warmth, and sensory capability—a core enabling material for embodied intelligence. Market forecasts project the global AI companion robot market will reach $1.8 trillion by 2035.

Four Core Application Scenarios

Scenario 1: Bionic Skin and Exterior Covering. Through multi-gradient hardness adjustment, silicone rubber can precisely simulate human skin texture and elasticity for covering robot faces, necks, and limbs, achieving high visual and tactile realism. The material has passed biocompatibility certification, is non-toxic and skin-friendly, and is suitable for civilian applications including home care, government reception, and elderly care services.

Scenario 2: Flexible Joints and Dexterous Hands. Humanoid robot precision operations heavily depend on liquid silicone rubber (LSR). Fingertip touch layers and flexible joint covering layers utilize ultra-low-hardness silicone rubber with excellent deformation recovery, enabling adaptive gripping of fragile objects such as glass, fruit, and precision components.

Scenario 3: Intelligent Sensing Substrate (Electronic Skin). By doping silicone rubber with nano-conductive materials, intelligent sensing materials capable of accurately identifying pressure, temperature, texture, and torque changes can be produced. Leveraging this material, robots can achieve touch perception, material discrimination, and safe obstacle avoidance.

Scenario 4: Sealing Protection and Thermal Management. Modified thermally conductive silicone rubber can be used for heat dissipation in computing chips and power modules, addressing heat accumulation issues under high-load operations. The high- and low-temperature resistance, moisture resistance, insulation, and anti-aging properties of silicone rubber also make it an ideal protective material for internal precision circuits and sensing modules in robots.

Why Is Silicone Rubber Irreplaceable?

Among various flexible polymer materials, silicone rubber stands out due to its comprehensive performance advantages: wide temperature range stability (-60~200°C), high elasticity, aging resistance, customizable modification (conductive/thermal-conductive/self-healing/high-resilience), and well-established domestic industrial chain support—making it superior to other flexible materials in cost, performance, and supply.

Industry Dynamics: Enterprises Accelerate Layout

Recently, Dayang Group (1991.HK) officially announced its transformation from a traditional silicone manufacturer to a "silicon-based bionic manufacturing system service provider," building four core capability areas covering "skin, muscle, bone, and brain," and launched the smart pet companion robot "LaChat" and the humanoid emotional companion robot "Ness.AI." The medical-grade bionic skin patent demonstrated by Dayang Group's artificial skin team, with tactile realism exceeding 95%, represents the latest achievement of silicone rubber materials in robotics applications.

Implications for Downstream Enterprises

As humanoid robot mass production accelerates, demand for high-performance silicone rubber materials is shifting from sample-level to industrial-grade. For silicone rubber product manufacturers, the following directions merit attention: optimization of low-hardness high-resilience LSR formulations, development of conductive/thermal-conductive functional silicone rubbers, research on self-healing silicone rubber materials, and customized product development for robot-specific sealing, heat dissipation, and sensing applications.

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